Dionysis Zindros is a cryptography researcher and a PhD candidate in the Cryptography & Security group at the University of Athens. He completed his Electrical & Computer Engineering degree at the National Technical University of Athens. He has worked in the product security team of Twitter in San Francisco, Google's Incident Response Development team in Zürich, and deviantART's software engineering team in Los Angeles. He is one of the co-founders of OpenBazaar, a decentralized anonymous marketplace. His research interests include decentralized systems, bitcoin, blockchain technologies, anonymizing networks, and political applications of cryptography.